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MIPS: Netlogic: Add support for built in DTB

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Provide a config option to embed a device tree for XLP evaluation
boards. This DTB will be used if the firmware does not pass in a
device tree pointer.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Patchwork: http://patchwork.linux-mips.org/patch/4103/
Signed-off-by: John Crispin <blogic@openwrt.org>
This commit is contained in:
Jayachandran C 2012-07-13 21:53:22 +05:30 committed by John Crispin
parent a9f1682120
commit 2f6528e15a
5 changed files with 32 additions and 1 deletions
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1
arch/mips/Kconfig
View file

@ -830,6 +830,7 @@ config NLM_XLP_BOARD
select ZONE_DMA if 64BIT
select SYNC_R4K
select SYS_HAS_EARLY_PRINTK
select USE_OF
help
This board is based on Netlogic XLP Processor.
Say Y here if you have a XLP based board.

15
arch/mips/netlogic/Kconfig
View file

@ -1,2 +1,17 @@
if NLM_XLP_BOARD || NLM_XLR_BOARD
if NLM_XLP_BOARD
config DT_XLP_EVP
bool "Built-in device tree for XLP EVP/SVP boards"
default y
help
Add an FDT blob for XLP EVP and SVP boards into the kernel.
This DTB will be used if the firmware does not pass in a DTB
pointer to the kernel. The corresponding DTS file is at
arch/mips/netlogic/dts/xlp_evp.dts
endif
config NLM_COMMON
bool
endif

1
arch/mips/netlogic/Makefile
View file

@ -1,3 +1,4 @@
obj-$(CONFIG_NLM_COMMON) += common/
obj-$(CONFIG_CPU_XLR) += xlr/
obj-$(CONFIG_CPU_XLP) += xlp/
obj-$(CONFIG_CPU_XLP) += dts/

4
arch/mips/netlogic/dts/Makefile Normal file
View file

@ -0,0 +1,4 @@
obj-$(CONFIG_DT_XLP_EVP) := xlp_evp.dtb.o
$(obj)/%.dtb: $(obj)/%.dts
$(call if_changed,dtc)

12
arch/mips/netlogic/xlp/setup.c
View file

@ -57,6 +57,7 @@ unsigned long nlm_common_ebase = 0x0;
/* default to uniprocessor */
uint32_t nlm_coremask = 1, nlm_cpumask = 1;
int nlm_threads_per_core = 1;
extern u32 __dtb_start[];
static void nlm_linux_exit(void)
{
@ -97,9 +98,18 @@ void __init prom_init(void)
{
void *fdtp;
fdtp = (void *)(long)fw_arg0;
xlp_mmu_init();
nlm_hal_init();
/*
* If no FDT pointer is passed in, use the built-in FDT.
* device_tree_init() does not handle CKSEG0 pointers in
* 64-bit, so convert pointer.
*/
fdtp = (void *)(long)fw_arg0;
if (!fdtp)
fdtp = __dtb_start;
fdtp = phys_to_virt(__pa(fdtp));
early_init_devtree(fdtp);
nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));